diff --git a/entrypoint.go b/entrypoint.go
index a664e09..ed1335a 100644
--- a/entrypoint.go
+++ b/entrypoint.go
@@ -196,6 +196,23 @@ type Claims struct {
 	Session SessionClaims `json:"session"`
 }
 
+func GetExtend(obj utils.DBObject, extends map[string][]tools.DataType) utils.DBObject {
+	base := obj.Serialize(obj)
+	for k, v := range extends {
+		if base[k+"_id"] == nil || base[k+"_id"] == "" {
+			continue
+		}
+		for _, vv := range v {
+			if d, _, err := models.Model(vv.EnumIndex()).GetAccessor(&tools.APIRequest{
+				Admin: true,
+			}).LoadOne(fmt.Sprintf("%v", base[k+"_id"])); d != nil && err == nil {
+				base[k] = d.Serialize(d)
+				break
+			}
+		}
+	}
+	return obj.Deserialize(base, obj)
+}
 func ExtractTokenInfo(request http.Request) (string, string, []string) {
 	reqToken := request.Header.Get("Authorization")
 	splitToken := strings.Split(reqToken, "Bearer ")
@@ -419,7 +436,7 @@ func (r *Request) LoadAll(isDraft bool, offset int64, limit int64) (data LibData
 * @param c ...*tools.HTTPCaller
 * @return data LibData
  */
-func (r *Request) LoadOne(id string) (data LibData) {
+func (r *Request) LoadOne(id string, extend ...string) (data LibData) {
 	defer func() { // recover the panic
 		if r := recover(); r != nil {
 			tools.UncatchedError = append(tools.UncatchedError, errors.New("Panic recovered in LoadOne : "+fmt.Sprintf("%v", r)+" - "+string(debug.Stack())))
@@ -437,7 +454,7 @@ func (r *Request) LoadOne(id string) (data LibData) {
 		data = LibData{Data: d, Code: code, Err: err.Error()}
 		return
 	}
-	data = LibData{Data: d, Code: code}
+	data = LibData{Data: GetExtend(d, d.Extend(extend...)), Code: code}
 	return
 }
 
diff --git a/models/bill/bill.go b/models/bill/bill.go
index cf25c40..df5aabb 100644
--- a/models/bill/bill.go
+++ b/models/bill/bill.go
@@ -28,6 +28,20 @@ type Bill struct {
 	Total     float64               `json:"total" bson:"total" validate:"required"`
 }
 
+func (ri *Bill) Extend(typ ...string) map[string][]tools.DataType {
+	ext := ri.AbstractObject.Extend(typ...)
+	for _, t := range typ {
+		switch t {
+		case "order":
+			if _, ok := ext[t]; !ok {
+				ext[t] = []tools.DataType{}
+			}
+			ext[t] = append(ext[t], tools.ORDER)
+		}
+	}
+	return ext
+}
+
 func GenerateBill(order *order.Order, request *tools.APIRequest) (*Bill, error) {
 	// hhmmm : should get... the loop.
 	return &Bill{
diff --git a/models/execution_verification/execution_verification.go b/models/execution_verification/execution_verification.go
index ad30ca3..e200424 100755
--- a/models/execution_verification/execution_verification.go
+++ b/models/execution_verification/execution_verification.go
@@ -18,6 +18,20 @@ type ExecutionVerification struct {
 	Validate             bool   `json:"validate" bson:"validate,omitempty"`
 }
 
+func (ri *ExecutionVerification) Extend(typ ...string) map[string][]tools.DataType {
+	ext := ri.AbstractObject.Extend(typ...)
+	for _, t := range typ {
+		switch t {
+		case "wokflow":
+			if _, ok := ext[t]; !ok {
+				ext[t] = []tools.DataType{}
+			}
+			ext[t] = append(ext[t], tools.WORKFLOW)
+		}
+	}
+	return ext
+}
+
 func (r *ExecutionVerification) StoreDraftDefault() {
 	r.IsDraft = false // TODO: TEMPORARY
 }
diff --git a/models/live/live.go b/models/live/live.go
index 95ff93f..f778ca3 100644
--- a/models/live/live.go
+++ b/models/live/live.go
@@ -44,6 +44,24 @@ type AbstractLive struct {
 	ResourcesID    []string              `json:"resources_id" bson:"resources_id"`
 }
 
+func (ri *AbstractLive) Extend(typ ...string) map[string][]tools.DataType {
+	ext := ri.AbstractObject.Extend(typ...)
+	for _, t := range typ {
+		switch t {
+		case "resource":
+			if _, ok := ext[t]; !ok {
+				ext[t] = []tools.DataType{}
+			}
+			ext[t] = append(ext[t], tools.WORKFLOW_RESOURCE)
+			ext[t] = append(ext[t], tools.DATA_RESOURCE)
+			ext[t] = append(ext[t], tools.COMPUTE_RESOURCE)
+			ext[t] = append(ext[t], tools.STORAGE_RESOURCE)
+			ext[t] = append(ext[t], tools.PROCESSING_RESOURCE)
+		}
+	}
+	return ext
+}
+
 func (d *AbstractLive) GetMonitorPath() string {
 	return d.MonitorPath
 }
diff --git a/models/models.go b/models/models.go
index 9b1f139..b8b4c80 100644
--- a/models/models.go
+++ b/models/models.go
@@ -8,6 +8,7 @@ import (
 	"cloud.o-forge.io/core/oc-lib/models/live"
 	"cloud.o-forge.io/core/oc-lib/models/order"
 	"cloud.o-forge.io/core/oc-lib/models/resources/purchase_resource"
+	"cloud.o-forge.io/core/oc-lib/models/utils"
 	"cloud.o-forge.io/core/oc-lib/tools"
 
 	"cloud.o-forge.io/core/oc-lib/models/booking"
@@ -15,7 +16,6 @@ import (
 	"cloud.o-forge.io/core/oc-lib/models/collaborative_area/rules/rule"
 	"cloud.o-forge.io/core/oc-lib/models/peer"
 	resource "cloud.o-forge.io/core/oc-lib/models/resources"
-	"cloud.o-forge.io/core/oc-lib/models/utils"
 	w2 "cloud.o-forge.io/core/oc-lib/models/workflow"
 	"cloud.o-forge.io/core/oc-lib/models/workflow_execution"
 	w3 "cloud.o-forge.io/core/oc-lib/models/workspace"
diff --git a/models/order/order.go b/models/order/order.go
index 0d2d8d3..ce566d1 100644
--- a/models/order/order.go
+++ b/models/order/order.go
@@ -17,10 +17,10 @@ import (
 
 type Order struct {
 	utils.AbstractObject
-	ExecutionsID string `json:"executions_id" bson:"executions_id" validate:"required"`
-	Status              enum.CompletionStatus                 `json:"status" bson:"status" default:"0"`
-	Purchases           []*purchase_resource.PurchaseResource `json:"purchases" bson:"purchases"`
-	Bookings            []*booking.Booking                    `json:"bookings" bson:"bookings"`
+	ExecutionsID string                                `json:"executions_id" bson:"executions_id" validate:"required"`
+	Status       enum.CompletionStatus                 `json:"status" bson:"status" default:"0"`
+	Purchases    []*purchase_resource.PurchaseResource `json:"purchases" bson:"purchases"`
+	Bookings     []*booking.Booking                    `json:"bookings" bson:"bookings"`
 
 	Billing map[pricing.BillingStrategy][]*booking.Booking `json:"billing" bson:"billing"`
 }
diff --git a/models/peer/peer.go b/models/peer/peer.go
index efa8e6e..b5b2b68 100644
--- a/models/peer/peer.go
+++ b/models/peer/peer.go
@@ -100,6 +100,20 @@ type Peer struct {
 	LastHeartbeat *time.Time `json:"last_heartbeat,omitempty" bson:"-"`
 }
 
+func (ri *Peer) Extend(typ ...string) map[string][]tools.DataType {
+	ext := ri.AbstractObject.Extend(typ...)
+	for _, t := range typ {
+		switch t {
+		case "peer":
+			if _, ok := ext[t]; !ok {
+				ext[t] = []tools.DataType{}
+			}
+			ext[t] = append(ext[t], tools.PEER)
+		}
+	}
+	return ext
+}
+
 func (ao *Peer) VerifyAuth(callName string, request *tools.APIRequest) bool {
 	return true
 }
diff --git a/models/resources/purchase_resource/purchase_resource.go b/models/resources/purchase_resource/purchase_resource.go
index b3e2f31..cb18dda 100644
--- a/models/resources/purchase_resource/purchase_resource.go
+++ b/models/resources/purchase_resource/purchase_resource.go
@@ -24,6 +24,33 @@ type PurchaseResource struct {
 	SchedulerPeerID string `json:"scheduler_peer_id,omitempty" bson:"scheduler_peer_id,omitempty"`
 }
 
+func (ri *PurchaseResource) Extend(typ ...string) map[string][]tools.DataType {
+	ext := ri.AbstractObject.Extend(typ...)
+	for _, t := range typ {
+		switch t {
+		case "dest_peer", "scheduler_peer":
+			if _, ok := ext[t]; !ok {
+				ext[t] = []tools.DataType{}
+			}
+			ext[t] = append(ext[t], tools.PEER)
+		case "execution":
+			if _, ok := ext[t]; !ok {
+				ext[t] = []tools.DataType{}
+			}
+			ext[t] = append(ext[t], tools.WORKFLOW_EXECUTION)
+		case "resource":
+			if _, ok := ext[t]; !ok {
+				ext[t] = []tools.DataType{}
+			}
+			ext[t] = append(ext[t], tools.WORKFLOW_RESOURCE)
+			ext[t] = append(ext[t], tools.DATA_RESOURCE)
+			ext[t] = append(ext[t], tools.COMPUTE_RESOURCE)
+			ext[t] = append(ext[t], tools.STORAGE_RESOURCE)
+			ext[t] = append(ext[t], tools.PROCESSING_RESOURCE)
+		}
+	}
+	return ext
+}
 func (d *PurchaseResource) GetAccessor(request *tools.APIRequest) utils.Accessor {
 	return NewAccessor(request) // Create a new instance of the accessor
 }
diff --git a/models/utils/abstracts.go b/models/utils/abstracts.go
index bc71260..79a7663 100755
--- a/models/utils/abstracts.go
+++ b/models/utils/abstracts.go
@@ -44,6 +44,20 @@ type AbstractObject struct {
 	Signature     []byte     `bson:"signature,omitempty" json:"signature,omitempty"`
 }
 
+func (ri *AbstractObject) Extend(typ ...string) map[string][]tools.DataType {
+	dt := map[string][]tools.DataType{}
+	for _, t := range typ {
+		switch t {
+		case "creator", "user_creator", "user_updater":
+			if _, ok := dt[t]; !ok {
+				dt[t] = []tools.DataType{}
+			}
+			dt[t] = append(dt[t], tools.PEER)
+		}
+	}
+	return dt
+}
+
 func (ri *AbstractObject) GetAccessor(request *tools.APIRequest) Accessor {
 	return nil
 }
diff --git a/models/utils/interfaces.go b/models/utils/interfaces.go
index 3ae8962..865a13f 100755
--- a/models/utils/interfaces.go
+++ b/models/utils/interfaces.go
@@ -18,6 +18,7 @@ type ShallowDBObject interface {
 // DBObject is an interface that defines the basic methods for a DBObject
 type DBObject interface {
 	GenerateID()
+	Extend(typ ...string) map[string][]tools.DataType
 	SetNotInCatalog(bool)
 	IsNotInCatalog() bool
 	SetID(id string)
diff --git a/models/workflow_execution/workflow_execution.go b/models/workflow_execution/workflow_execution.go
index ea3d1d3..0e5e3e4 100755
--- a/models/workflow_execution/workflow_execution.go
+++ b/models/workflow_execution/workflow_execution.go
@@ -58,6 +58,20 @@ type WorkflowExecution struct {
 	SelectedStrategies   workflow.ConfigItem `json:"selected_strategies"`
 }
 
+func (ri *WorkflowExecution) Extend(typ ...string) map[string][]tools.DataType {
+	ext := ri.AbstractObject.Extend(typ...)
+	for _, t := range typ {
+		switch t {
+		case "workflow":
+			if _, ok := ext[t]; !ok {
+				ext[t] = []tools.DataType{}
+			}
+			ext[t] = append(ext[t], tools.PEER)
+		}
+	}
+	return ext
+}
+
 func (r *WorkflowExecution) StoreDraftDefault() {
 	r.IsDraft = true
 	r.State = enum.DRAFT